Laxative



Patented May 25', 1926.

UNITED STATES PATENT OFFICE.

nmrn mrmrs, F VOHWIN'KEL, GERMANY, ASSIGNOR T0 WINTHROP CHEMICAL COMPANY, me, on NEW YORK, N. Y.

LAXATIVE.

No Drawingl It has been found that the laxative action of the 1.S-dihydroxyanthraquinone can be considerably increased by the admixture of a small amount of magnesium oxide (MgO).

It is surprising that even a relatively small amount of this product suflices to considerably increase the laxative action. A mixture of 0.1 gram of 1.8-dihydroxyanthraquinone and 0.2 gram of magnesium oxide has the same laxative action as doses of 0.2- 0.3 gram of the 1.8-dihydroxyanthraquinone. This reduction of the doses is very important for theme of such laxatives for sensitive persons and it means saving costs in T veterinary medicine.

In order to illustrate my invention more fully, I give the following example Ewample.100 parts by weight of 1.8-

Application filed May is, 1925. Serial No. 30,614.

dihydroxyanthraquinone are ground together with 200 parts by weight of magnesium oxide and from this mixture tablets are pressed. The yellowish white tablets assume a red coloration, caused by the formation of the magnesium lake.

I claim 1. The process for preparing laxatives, which process consists in mixing 1.8-dihydroxyanthraquinone with magnesium oxide.

2. As a new article of manufacture a-laxa- 80 tive being a mixture of 1.8-dihydroxyanthraquinone with magnesium oxide.

3.- As a new article of manufacture a laxative tablet comprising 1.8-dihydroxyanthraquinone and magnesium oxide. I

In testimony whereof I have hereunto EMIL IMPENS? .set my hand. 

